#!/usr/bin/python2.4
#
#Copyright 2009 Google Inc.
#
#Licensed under the Apache License, Version 2.0 (the "License");
#you may not use this file except in compliance with the License.
#You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
#Unless required by applicable law or agreed to in writing, software
#distributed under the License is distributed on an "AS IS" BASIS,
#WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#See the License for the specific language governing permissions and
#limitations under the License.
#

"""This module is used to define a base request handler.

All the RequestHandler classes will inherit from this base class. The function
to render html templates is abstracted out into this class.
"""

import os
from google.appengine.ext import webapp
from google.appengine.ext.webapp import template


class BaseRequestHandler(webapp.RequestHandler):
  """This class supplies a common template generation function.

  All the RequestHandler classes will inherit from this base class.
  """

  def GenerateHtml(self, template_name, template_values):
    """Renders html template with the given values.

    Args:
      template_name: String indicating the html template to render.
      template_values: A map of key/value pairs used to render the template.

    Returns:
      The rendered html content.
    """
    directory = os.path.dirname(__file__)
    path = os.path.join(directory, os.path.join('templates', template_name))
    content = template.render(path, template_values)
    return content
